/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.solr.client.solrj.io.comp;

import java.io.Serializable;
import java.util.Comparator;

import org.apache.solr.client.solrj.io.Tuple;

/**
 * Defines a comparator that can be expressed in an expression
 */
public abstract class StreamComparator implements Comparator<Tuple>, Serializable {
  protected String leftField;
  protected String rightField;
  protected final ComparatorOrder order;

  public StreamComparator(String field, ComparatorOrder order) {
    this.leftField = field;
    this.rightField = field;
    this.order = order;
  }
  public StreamComparator(String leftField, String rightField, ComparatorOrder order){
    this.leftField = leftField;
    this.rightField = rightField;
    this.order = order;
  }
}
